The Hexamilion wall was constructed near this city by Theodosius in the fifth century to protect against Visogothic incursions. Previously this city was destroyed by Lucius Mummius in 146 BC, but re-founded in 44 BC. This city-state's conflict with its colony Corcyra was the impetus of the Great Peloponnesian War and Phillip II established a league centered at this city to maintain Macedonian hegemony over Greece. An early ruler of this city, the tyrant Periander, built a railed ramp called the 
The Hexamilion wall was constructed near this city by Theodosius in the fifth century to protect against Visogothic incursions. Previously this city was destroyed by Lucius Mummius in 146 BC, but re-founded in 44 BC. This city-state's conflict with its colony Corcyra was the impetus of the Great Peloponnesian War and Phillip II established a league centered at this city to maintain Macedonian hegemony over Greece. An early ruler of this city, the tyrant Periander, built a railed ramp called the diaklos to facilitate the movement of ships across this city's titular isthmus. For 10 points, name this Greek city-state, located at the mouth of the Peloponnesus and host of the Isthmian Games.
The Hexamilion wall was constructed near this city by Theodosius in the fifth century to protect against Visogothic incursions.
{Corinth}